package main

import "fmt"

func main(){
	A :=2
	B :=A
	B = 3
	fmt.Println(A,B)

	//指针
	var cc *int =&A
	C :=&A
	fmt.Printf("%T %T\n",C,cc)

	fmt.Println(*cc)
	*cc =4
	fmt.Println(A)
}
